The read) systemcall in Unix, need the following API library to be include in the code iostream stdio.h O unistd.h O iomanip Highest response ratio next (HRN) is a preemptive scheduling algorithm. O Yes O No A Sotreal-ime is a concept of Time sharing operating system O True O False in a batch operating system The programmers leave their programs with the operator and the operator then sorts the programs with similar requirements into batches O True False Who many right has the Open Source definition O 4 right 9 right O 3 right O 7 right